Large-scale distribution of a deep-sea megafauna community along Mediterranean trawlable grounds

Other titles Distribución espacial a gran escala de la megafauna de aguas profundas en fondos arrastrables del Mediterráneo
Type Article
Date 2019-12
Language English
Author(s) Fernandez-Arcaya Ulla1, Bitetto Isabella2, Esteban Antonio3, Farriols M. Teresa1, García-Ruiz Cristina4, Gil De Sola Luis4, Guijarro Beatriz1, Jadaud Angelique5, Kavadas Stefanos6, Lembo Giuseppe2, Milisenda Giacomo7, Maina Irida6, Petovic Slavica8, Sion Letizia9, Vaz SandrineORCID5, Massutí Enric1
Affiliation(s) 1 : Intituto Español de Oceanografia, Centre Oceanogràfic de les Balears, Moll de Ponent s/n, 07015 Palma de Mallorca, Illes Baleares, Spain
2 : COISPA Tecnologia & Ricerca, Bari, Italy
3 : Intituto Español de Oceanografia, Centro Oceanográfico de Murcia, Varadero n 1, Apt. 2230740 San Pedro del Pinatar, Murcia, Spain.
4 : Intituto Español de Oceanografia, Centro Oceanográfico de Malaga, Puerto pesquero s/n 29640 Fuengirola, Malaga, Spain
5 : UMR Marbec, Ifremer, IRD, Université de Montpellier, CNRS, Avenue Jean Monnet - CS 30171 - 34203 Sète Cedex, France
6 : Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (IMBRIW/HCMR), 46.7 km Athens, Greece
7 : Institute for Coastal Marine Environment (IAMC), National Research Council (CNR), Via L. Vaccara n 61, Mazara del Vallo (TP), 91026, Italy
8 : University of Montenegro-Institute of Marine Biology, Dobrota bb, 85330 Kotor, Montenegro.
9 : University of Bari Aldo Moro (UNIBA), Department of Biology, Via Orabona 4, 70125 Bari, Italy.
Source Scientia Marina (0214-8358) (Departmento de Publicaciones del CSIC), 2019-12 , Vol. 83 , N. S1 , P. 175-187
DOI 10.3989/scimar.04852.14A
WOS© Times Cited 2
Note Mediterranean demersal resources and ecosystems: 25 years of MEDITS trawl surveys. M.T. Spedicato, G. Tserpes, B. Mérigot and E. Massutí (eds)
Keyword(s) distribution pattern, fishing impact, continental slope, deep sea, megafauna, red shrimp, community
Abstract

The large-scale distribution pattern of megafauna communities along the Mediterranean middle slope was explored. The study was conducted between 500 and 800 m depth where deep-water fishery occurs. Although community studies carried out deeper than 500 m are partly available for some geographic areas, few large-scale comparative studies have been carried out. Within the framework of the MEDITS survey programme, we compared the megafauna community structure in ten geographical sub-areas (GSAs) along the Mediterranean coasts. Additionally, the spatial distribution of fishing was analysed using vessel monitoring by satellite information. Overall, the community showed a significant difference between sub-areas, with a decreasing eastward pattern in abundance and biomass. Longitude was the main factor explaining variation among sub-areas (by generalized additive models). However, we found a region which did not follow the general pattern. GSA 6 (northern Spain) showed significantly lower abundance and a different composition structure to the adjacent areas. The decrease in community descriptors (i.e. abundance and biomass) in this area is probably a symptom of population changes induced by intense fishery exploitation. Overall, a combination of environmental variables and human-induced impacts appears to influence the bentho-pelagic communities along the slope areas of the Mediterranean.

Abstract <p>En este estudio se describe la estructura y patrones de distribuci&oacute;n de la comunidad de megafauna que habita en el margen continental medio a lo largo del Mediterr&aacute;neo. El estudio se realiz&oacute; entre los 500 y 800 m, coincidiendo espacialmente con las pesquer&iacute;as de profundidad. A pesar de que se conoce parcialmente la estructura de las comunidades que habitan por debajo de 500 m, existe la necesidad de estudiar estas comunidades a una escala espacial m&aacute;s amplia. Dentro del marco del proyecto internacional MEDITS, se compar&oacute; la estructura de las comunidades en diez sub-&aacute;reas geogr&aacute;ficas (GSAs) a lo largo de las costas mediterr&aacute;neas. Adem&aacute;s se analiz&oacute; la distribuci&oacute;n espacial del esfuerzo pesquero utilizando la informaci&oacute;n de los datos de seguimiento de buques. En general los resultados mostraron diferencias significativas entre sub&aacute;reas mostrando un patr&oacute;n decreciente en los valores de biomasa hacia el este, siendo la longitud el principal factor explicativo del modelo de distribuci&oacute;n (GAMs). Sin embargo, encontramos una sub&aacute;rea que no segu&iacute;a el patr&oacute;n general, la GSA6 (norte de Espa&ntilde;a). La GSA6 mostr&oacute; una biomasa y estructura de la comunidad diferente a las &aacute;reas adyacentes. La disminuci&oacute;n de la biomasa en esta &aacute;rea parece ser un s&iacute;ntoma de los cambios poblaciones causados por la elevada intensidad de pesca en la zona. Los resultados sugieren que la distribuci&oacute;n y estructura de las comunidades bento-pel&aacute;gicas parecen estar moduladas por la combinaci&oacute;n de las variables ambientales y los impactos producidos por la actividad humana.</p>
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Fernandez-Arcaya Ulla, Bitetto Isabella, Esteban Antonio, Farriols M. Teresa, García-Ruiz Cristina, Gil De Sola Luis, Guijarro Beatriz, Jadaud Angelique, Kavadas Stefanos, Lembo Giuseppe, Milisenda Giacomo, Maina Irida, Petovic Slavica, Sion Letizia, Vaz Sandrine, Massutí Enric (2019). Large-scale distribution of a deep-sea megafauna community along Mediterranean trawlable grounds. Scientia Marina, 83(S1), 175-187. Publisher's official version : https://doi.org/10.3989/scimar.04852.14A , Open Access version : https://archimer.ifremer.fr/doc/00489/60051/